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Old 12-12-2014, 08:48 PM
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Default My test: HiFonics Colossus PRO 5k

This thing caught my eye because huge A/B power isn't very common. Not this sort of power anyway. Or size. It's enormous. And because this is as good as it gets for HiFonics. The Mt. Olympus stuff is their "premium" line. So when a buddy of mine went looking for big A/B power on a budget, I blindly suggested this thing because... I wanted to test it. Lol. Well, that... and the fact that there aren't any "budget" 2,000w class A/B amps.

I called HiFonics to ask them if I could open it up without voiding the warranty and they flat out said, "No." Lol. But when I called, I got a human on the phone that spoke English and that lead to a very nice conversation. That impressed me. He was very forthcoming and helpful and was just a regular ol' basshead like us. We talked for like, half an hour.

HiFonics Colossus PRO 5,000.
Rated...
600x2 @ 4
950x2 @ 2
1,250x2 @ 1
1,900x1 bridged @ 4
2,400 bridged @ 2

I assume these are at 14.4v

Anyway... this thing is hyoooooj. As evidenced by the rather stretched out tape measure. I shit you not... it's longer than the TFE. It's also pretty clean looking and the logo lights up if you're into that kinda thing. Seems like a waste of voltage to me.



This is a rather impressive input section. Lots of control here. Bandpass crossover, x10 switch and something you don't see every day, an adjustable 'Q' parametric EQ. Nice. You'll also notice a rather busy "bass" knob with diagnostics as well as a 3 stage clip light. I didn't bother testing it's accuracy, but I assume it's as accurate as or tied into the onboard one and that one was pretty dead on.



Here's something else you won't see everyday... dual 1/0 power and grounds on an A/B. AND they're grouped into + and -. I like that. Solid 8awg output terminals. Set screws are hex. Thank you.



Here's where the guts were supposed to be Oh well. They have a couple shots of some of the components online, but no overviews. Side note here... the tech I spoke with said that they can actually tell if the backplate comes off even without the sticker. They can ALSO see the last (10) faults the amp had. Sneaky sneaky. Bish has onboard memory.



Testing...

Unloaded. I don't know why, but I expected to see more voltage than this- even though that's a lot of f'n voltage from a "2k".



10 ohms bridged (5 ohms per channel, obviously). I kinda took a little concession on the voltage here. Whoops.



That's 750w @ 10ohms bridged & 14.9v with 63% efficiency.

Bridged at 5 ohms.



1,350w bridged @ 5 ohms 14.4v. Still maintaining 63% efficiency.

Bridged @ 2.5ohms.



2,350w bridged @ 2.5ohms & 14.7v. Efficiency drops to 59% here. Not too shabby.

Little bit of voltage drop in case y'all are wondering. Still bridged at 2.5 ohms here.



Still doing 2,000w @ 13.5v and still holding ~ 60% efficiency. You can see it just starting to square off. We're still ok here and probably more of a real world type of voltage. You'll see some flickering on the clip light, but it won't be dead red.

One last test... I was actually recording a video here so I couldn't keep an eye on voltage, but I assume it was near the 13.5v result. It was beat up pretty good by this point.




So... HiFonics Mt. Olympus Colossus PRO
Rated - 600x2 @ 4 ohm... did 375x2 @ 5 ohm
Rated - 950x2 @ 2 ohm... did 675x2 @ 2.5 ohm
Rated - 1,250x2 @ 1 ohm... did 1,175x2 @ 1.25 ohm

Rated - 1,900 bridged @ 4... did 1,350 bridged @ 5
Rated - 2,400 bridged @ 2... did 2,350 bridged @ 2.5

Ugh. I really need to get some even number value resistors. It's weird comparing 5 ohm to 4 ohm or whatever. But you can see the closer the tested load got to the rated load, the closer the results got the the ratings. Especially down low at 1 ohm vs. 1.25 ohm.

Although it fell short of ratings higher up, it seemed like it woke up when wired down. The 10 ohm and 5 ohm results were the first power the amp had seen. Do amps need burn in? I dunno. Either way... the amp got close enough bridged at 2.5 ohms for me to give it a pass.

The amp sells for ~ $500 but you can find them for less if you shop around. You might miss out on your warranty if you look for the best deal (unauthorized dealers). It's actually more expensive than it's more powerful mono class D namesake, but that's the price you pay for class A/B.

There are a couple other A/B offerings of this size. And they would probably whoop it. But you will likely pay double for those. It's a $500 "budget" class A/B surfboard. It's comparably priced with Korean class D 2k monos if you're shopping for a sub amp. And it could certainly run subs. But knowing you guys, this thing would probably run an array of super tweeters. Oh, my ears!!
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Last edited by TaylorFade; 12-12-2014 at 08:51 PM.
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Old 12-12-2014, 09:04 PM
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Wow...not bad at all for that price. Thanks t-fade!
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Old 12-12-2014, 09:09 PM
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I believe these are the guts
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Old 12-12-2014, 09:14 PM
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Looks sexy...nice design...still wondering when hifonics will finally venture into tiffany RCA territory...
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Old 12-12-2014, 09:23 PM
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gat dayum that bish is huge! Im going to go out on a limb here....but i think the size will be its biggest downside...
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Old 12-12-2014, 09:51 PM
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24 dB/Oct only when bridged?
Nice test too, wish I still had my VI and VIIs.
What a dumb azz I am for selling those.
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Old 12-12-2014, 10:00 PM
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no tl testing?

woulda been fun to see what this does vs a 2k mono

also did you forget the saz200.4 beast of a a/b amp
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Old 12-12-2014, 10:15 PM
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I wish all power and ground inputs were arranged in this manner.
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Old 12-12-2014, 10:18 PM
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Quote:
Originally Posted by tymoto21 View Post
no tl testing?

woulda been fun to see what this does vs a 2k mono

also did you forget the saz200.4 beast of a a/b amp
Still a possibility. Didn't have anything in the CRX that could take it at the time. Still doing the 12" sub roundup.

And the 200.4 is discontinued. I was thinking more about the B2 Audio Duo or American Bass VFL-4000

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Originally Posted by Todd Dupler View Post
I wish all power and ground inputs were arranged in this manner.
I know, right?
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Old 12-12-2014, 10:39 PM
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Is there a down side to dual inputs that are matched vs alternating?
Looking at the gut shot Jeff posted it appears jumpers are used to group the pos and neg connections, is there a reason most companies don't do this on other multi input designs?
Failure rate, voltage drop, cheap-o?
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